Combined picture-projecting and sound-reproducing machine.

Invention Grant

US1277991A Combined picture-projecting and sound-reproducing machine. 失效

Title translation: 组合图像投影和声音再现机。

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Patent Title: Combined picture-projecting and sound-reproducing machine.
Patent Title (中): 组合图像投影和声音再现机。
Application No.: US16521817

Application Date: 1917-04-28
Publication No.: US1277991A

Publication Date: 1918-09-03
Inventor: MOLTCHEN JOSEPH
Applicant: MOLTCHEN JOSEPH
Assignee: Joseph Moltchen
Current Assignee: Joseph Moltchen
Priority: US16521817 1917-04-28

Combined picture-projecting and sound-reproducing machine.

Public/Granted literature

US10917814B2 Methods and devices for content delivery control Public/Granted day:2021-02-09

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